Oak Park Regional StorageCity of Sacramento, California

February 11, 2014

West Yost designed an off-line storage project to address
flooding and assist the City in meeting their EPA issued consent
decree to improve performance of the combined system through a
new facility to store flows and reduce street flooding
temporarily during storm events. These conveyance facilities then
allow the stored storm flows to be released back into the
combined sewer system.

The off-line storage project includes 800 feet of new 724-inch
combined sewer pipeline, a weir structure, and an approximate
500,000 cubic foot underground storage facility located in a
community park. The storage facility consist of parallel 10
feet diameter pipelines connected to a common cast-in-place
concrete inlet/outlet structure.

Based on preliminary estimates from an ongoing CCS Update Study,
the dollar investment/gallon of flood reduction at the Oak Park
Facility is estimated to be the lowest of all the City’s seven
similar facilities constructed to date.

In addition to flood control and combined system overflow
protection, this project provides additional significant benefits
to the community. Most significantly, it will transform an unused
portion of the park into a youth soccer field.